{
  "manageEntity": {
    "action": "Save",
    "entityId": "81271",
    "entityType": "Track",
    "nonce": "0x564527fdf6c3985e19549c2391f1721a22b0ddc4758bbf0d142cb55ca370d76d",
    "signature": "0x8fb70578ef853b11e65b7ea3263163419a2666616dd067b4651900a63ff722d301067862c3bd985dce249d2f1f374a20131d40a66a7bd2e70137d23a464471011b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}