{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896999759",
    "entityType": "Track",
    "nonce": "0xb1e2c1682b5fe9e6bf090827d34bea8b5ca165b02664cc13c004f483617deb9a",
    "signature": "0x84fc558d06ad393b739b3bc88299ae8e127097f7a6921daa7573405add6100a925f557c39cdac89389fab76b6b2617a92e6471e731e7b3fc8700ddef8236eae11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}