{
  "manageEntity": {
    "action": "Save",
    "entityId": "545428",
    "entityType": "Track",
    "nonce": "0xb37db1ee93abe3a00b45ec0715b53f350701b8aef5f74ce5783d7f69e8cf83ed",
    "signature": "0xd32f876e4dcdb8f8ec4219cd7845c4cf6125e4f0f5c952efad8181182f32c4bb1ac553c5a1411363106c2183c06b141220779862cf800e6b90860dffeb4f67ac1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}