{
  "manageEntity": {
    "action": "Save",
    "entityId": "1293640828",
    "entityType": "Track",
    "nonce": "0x2e5cff5ac7842c94c0a6bba29f40de18a1012c4077399b6f12f07c830a0a066b",
    "signature": "0x24a611cdcc81243c4ba053aee4a05027a35e3555bf76f0c7d31211eb096ddc83040d094c99d3c42d0bf30e2f563b5e28cca07c95c5839a5a92682514362854181c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}