{
  "manageEntity": {
    "action": "Save",
    "entityId": "1847040270",
    "entityType": "Track",
    "nonce": "0x7d2d17d83989cbeaae6ba20f513feca37bf185d7776526621bc01985f91dbbba",
    "signature": "0xfe91fed33eb5177a1a649bdc5bd60328c56ef70464bc6a46e1888028860a4fdb0ec44a314d5b7813487b802118f1192e949af5e28a6b18d82027817c261562b41b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}