{
  "manageEntity": {
    "action": "Save",
    "entityId": "1649100496",
    "entityType": "Track",
    "nonce": "0xd5414954a0b33e4f68b89e3ed26cbb6f652820fa7f8eede260cc5b2a644d08ea",
    "signature": "0x187faa1edebc9ebfde268c7f93300da8986747a4a5bdd88976b7f1910dc301734365a712bdb27c58681d4b828fc576dd037689dcba866aae78eb016c1ed578a11b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}