{
  "manageEntity": {
    "action": "Save",
    "entityId": "1412281134",
    "entityType": "Track",
    "nonce": "0x5ae6706fe3a2b2c1b308aefd8c03faaf17cc832c4ec47621e7b1a65c0824ead8",
    "signature": "0x574402564d09334dbbc2987012016edc255eadaa54f582f5218f7e0e7282cab30b65fb7d42af8215f6a598650a566c3738aa7f427c4cfcbf522f5c5ef2aec4301b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}