{
  "manageEntity": {
    "action": "Save",
    "entityId": "1772038259",
    "entityType": "Track",
    "nonce": "0xc0b146074cbb09ddabc9ab9e8d5c36e746dc6fae5a41db78659cf6fa109984ea",
    "signature": "0x864b661799f12cf7f2660d4191a812d38007949cee21454d924b0015b505fd1b637880aaf19afcd5bcd5f1a1912e3cca036be52ff8aab2ea3a675102babf15d91b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}