{
  "manageEntity": {
    "action": "Save",
    "entityId": "1463691836",
    "entityType": "Track",
    "nonce": "0x91637b1f34352c4329cfe31e9866612e0e9c8d7c45f92724e30861f3354180c8",
    "signature": "0x41105c7dc27cc58736936b42675591a9e0aa260c18807ae54720ca79c872c75f25019fe7a67821a17d4b703e49200f8bf2a83c428dc524074fc1dcb1350c9e311b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}