{
  "manageEntity": {
    "action": "Save",
    "entityId": "708910889",
    "entityType": "Track",
    "nonce": "0xf13c4867267907c6110a89be5acd297868eac950960cc01137be98312ef852b2",
    "signature": "0x3042ae211d9fc694070234ed9254f125cd6131cdacbd75b6c9c01e044c5631380cd0ae93fbe01a412f1b420ac6091fd96acdb7e1864d5b84613a211f6560fb1d1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}