{
  "manageEntity": {
    "action": "Save",
    "entityId": "1941929567",
    "entityType": "Track",
    "nonce": "0x579a724c06b927ac6b08239a4b2ff7fe4e7e782089fda80509028d21999e91ad",
    "signature": "0x960d5977ef6265c3f7bbe1e5ee5e911a65938571c62c0cacc5d052671a90291a11bd92f4e300b511f08f96fe948dc0cef914cf76a4dfd8aeb2482cfe45d17be41b",
    "signer": "0x98fC2b30E6e70e62dB2b5fAE7b0292DE3D4323Bf",
    "userId": "480962013"
  }
}