{
  "manageEntity": {
    "action": "Save",
    "entityId": "73706156",
    "entityType": "Track",
    "nonce": "0xa16a9d217c345b586542ad6719804f4858fcec05a40cf61dede2a0925eff422f",
    "signature": "0x767d95e76dc33e987cf6ebdf5409b6b8d811be3709f19b180bbe23f05ba6ced46d7bac17c25801a15d1d8ef5b5435192dff8a8e61dd340e484020f04ae777b2d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}