{
  "manageEntity": {
    "action": "Save",
    "entityId": "1208990100",
    "entityType": "Track",
    "nonce": "0x9df2b9dd0cf6a2ebd0ba5b12427310efe9ec922e48a42f2092211d37ed77bc96",
    "signature": "0xb89e86ae3eb282c5a5dc30dc3b1ec3cf678cd2b95501065ebcb0500e3f9fff1b10bc68b3f12db6a07a634a9f6262c3336ff6a3927adc3532d8cce7fb62bcf2c71b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}