{
  "manageEntity": {
    "action": "Save",
    "entityId": "1991831203",
    "entityType": "Track",
    "nonce": "0x0ab12f46abca152e21ab76cdaac17bfc07300fff9188082837084e6dcfe0be75",
    "signature": "0x6c53a57281b1c1e174b5f153ba48b01b7f2ec7018d603598b9b420961340aacf2181db2c8fa15f7ff1f325c7b2f64ae12c0eed5994e771bc234343555fee07b81c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}