{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984821525",
    "entityType": "Track",
    "nonce": "0x943fc7348a7b1add397ab6c862383f448780c1112cf2ab03ee3e87937c2299c3",
    "signature": "0xac2705bdd8fd02786dc784876afff6180b2c49aa1ac61cfca483addeefa7d34d1cd5695ec49e13d85fc7fcea2f8d0dfa52182027a24a684e662dcb833db537da1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}