{
  "manageEntity": {
    "action": "Save",
    "entityId": "2017872417",
    "entityType": "Track",
    "nonce": "0x6f2adcb501282e8135d8cf6cd94300bfdcd9a08a9b7b5e37ced8018a31574e24",
    "signature": "0x2c646b5717a74bd6c9667effd4762b368b8956d37eeca2dcc81e1354c326b61163d955465b0eea65c729db07119fb9060073d2c1606753902c1a96dc24a8b8931b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}