{
  "manageEntity": {
    "action": "Save",
    "entityId": "766508358",
    "entityType": "Track",
    "nonce": "0x85d9341d6b6d85afd160e3cead4f3fd9ee83a4f429264db81be11bb74104371d",
    "signature": "0xf29321b00a56cecd1612e8601b488659857544aeff68284e447654477769af2336d6d5fbbb7a73b7c89d3a0385a6d0242ca9d04249944986001d4eacd0f0f7021b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}