{
  "manageEntity": {
    "action": "Save",
    "entityId": "1584194202",
    "entityType": "Track",
    "nonce": "0x70faf12166d61ac27874deca0e9b36a208b1e0fc0bb59f10bcd3ea580cd8cf7d",
    "signature": "0x0fd379a16e24da91704ab73c06c1d0bb112bbdd211df359a1cb90393ff9207ec5f947ade11ba2f4fec80b90e33dc81b52018133ce41a9f3b30562a48cb7338341c",
    "signer": "0x6d94Ff17186121f06D9440fB1ADF9A02CBD31630",
    "userId": "989488626"
  }
}