{
  "manageEntity": {
    "action": "Save",
    "entityId": "1746616910",
    "entityType": "Track",
    "nonce": "0x3fa9fba46cd053727a14ac8b2fc81becd32d5bf9c978ea1dd2d454f28e767204",
    "signature": "0x93f04e83ef299e55fef6d59dc9b329c57834946a035b68d4848e942edb60736a53bd6311e97552e377708af973f953c2f2b8a7fbd56e8114f0823fb24c1766c71c",
    "signer": "0x4089d1751487aA665C895419F2578a6Cf33BE481",
    "userId": "728155533"
  }
}