{
  "manageEntity": {
    "action": "Save",
    "entityId": "1330720954",
    "entityType": "Track",
    "nonce": "0xffaee388cc27a06b4c1b26d4085a03ba1e657fa38998f4d2818997cff2ebbdac",
    "signature": "0xce72a8fc5568978dd9e4245dfc7ac819b8082a60fb16b03afb69e77e7dd6d5d358777a702f45b0194ccde4198dd1d73ff0affb6d1b38dbf95f1af5cfecb6ffe61b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}