{
  "manageEntity": {
    "action": "Save",
    "entityId": "1131775307",
    "entityType": "Track",
    "nonce": "0x9701ec653397db913351c77820447631ce6dcffa3f49da49a7ea4f62f1fc8510",
    "signature": "0x23d82ed26675c1b86c1ef814cb9b5bf6915804ccbf01b6998c8eca142e220cdd318661713e7383d25a57855b3039d3c92dcec7ebc09a60136d6ac3bc55d354481c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}