{
  "manageEntity": {
    "action": "Save",
    "entityId": "1883436137",
    "entityType": "Track",
    "nonce": "0xcefbf8c01a6480347f31a7d09519a789de52aa4afb23d99e614792e57a178809",
    "signature": "0x5667d0aad9482cdb4eed67b7988703623f5dbf7ca2d144b3811f838c9d922dd144ad17dbddff620a5c49db08aae5ef0e1a50736514154b50f73599e67779d3271c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}