{
  "manageEntity": {
    "action": "Update",
    "entityId": "748290845",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x979e7cb8c5acaeb3812c6ad7b9975fb57045916ed1b372e13e68aae51a7cacbc",
    "signature": "0x80ff95ca34e7dc86842ade1e3e8aca74de801c876cbe432e0d2eb33c81c78b401d7561d66b2c797cf773d79da74dd717550937808593c613a5f2ec44dd4eac3e1c",
    "signer": "0x3df1D80c0836a5b2ae8fBb009AE9DE9A0C9f4fe2",
    "userId": "748290845"
  }
}