{
  "manageEntity": {
    "action": "Save",
    "entityId": "420267",
    "entityType": "Track",
    "nonce": "0x4aadd5f0912d493c3501c93a1c4a24d517baa1f0a3eb3f0154f6ce43e5bbcaed",
    "signature": "0x01b3d2a771500d29107357eb973795a6b418dbbd004d0b04654c3b462a204b4c74eb8c1f7851df2830aa129d5a41817158f3dbf5c89e2ba0349aeb4d90adf0ad1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}