{
  "manageEntity": {
    "action": "Save",
    "entityId": "1303675394",
    "entityType": "Track",
    "nonce": "0x43f128b1ad0ed780fba40195104ca0e231f6fd4e46e8f2903d8e33f9dc0ae129",
    "signature": "0x2330ca8d97a99f094fbc924a158e573759701466fdab1470e7c3f74759c2cd2853fc26b4ab92be527812b9ea93bbca67b2b480032249a6b30a6a215fc51ec3121c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}