{
  "manageEntity": {
    "action": "Save",
    "entityId": "1785941086",
    "entityType": "Track",
    "nonce": "0x44a631d7225216fb7150d9e32645bba113cf02044c9aa251fb6a3aea973c0395",
    "signature": "0xd911e0c2cf3e9d15dc0bfd9ef605ec0646aecd1238b89bb32933c97f44b93bbe664f6af29888462175fc64914dfca0bd381d7045c08b8e3cd14c72f1d1a80ff11b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}