{
  "manageEntity": {
    "action": "Save",
    "entityId": "306956988",
    "entityType": "Track",
    "nonce": "0xdb0a4d9cc10928b371c5b64d8bca494508559c1a609bb3119f57c7fd7145884a",
    "signature": "0xdbfcc6f9f890538e72c36aa7368ac0053fd8ce90b91abfbb4cf92c59a898e2f82e95faf878273919c43062867a82fa00c9a39ed2be195f4ec02ea17da9846d0f1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}