{
  "manageEntity": {
    "action": "Save",
    "entityId": "937896094",
    "entityType": "Track",
    "nonce": "0x53f986b8aa68eda15112beceae21a49ff031871fd0d0f5886d949afba0ad28c7",
    "signature": "0x1a5587ebdb398ba6c4e8e780376c677b4b6ad87e0bf9c18c72ec3104db50d7110f608c922ebb367ad79d068c4750ce5bdeb445ab104930e24ed6df2bdc1730871c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}