{
  "manageEntity": {
    "action": "Save",
    "entityId": "809644952",
    "entityType": "Track",
    "nonce": "0x4168fc92a86440ea3e0d3976d098a0ff9e691f6eeb18e37358aa824423183e3e",
    "signature": "0x34ca70a5b94e649fc03f382ac5a851d62d5a4928d080f4faf3cd3cbbdea618490d7812de447744cb3f9ebba03abc61a55d50495abdcdae749b9ddaec7b26f0611c",
    "signer": "0x4089d1751487aA665C895419F2578a6Cf33BE481",
    "userId": "728155533"
  }
}