{
  "manageEntity": {
    "action": "Save",
    "entityId": "712932764",
    "entityType": "Track",
    "nonce": "0xce806ba672cfca1adc6a7fd85ffb639e47ba6d2ddea2c538ce1b48a19b441a6e",
    "signature": "0x18e91c615219db99932f85e9abc3f520cb1cace554dac03b7d53164f766d3fe31acd09f4643eb94d2381b137acf927379daca551da5c88b4390c9fc2bcc103e01b",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}