{
  "manageEntity": {
    "action": "Save",
    "entityId": "1084716578",
    "entityType": "Track",
    "nonce": "0xb574688a7b0a636245a41c10338d4d2780e4928ecd9f77f41f1be1e1a02b7131",
    "signature": "0x0733d53f6caef129afde3868b9ef21fae0acdd0e7e7f7388af52a9ab6c438cc8330dedb8271f8565082c3c6030c20245dcab8021d6d99258fd7be1769437770c1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}