{
  "manageEntity": {
    "action": "Save",
    "entityId": "734706254",
    "entityType": "Track",
    "nonce": "0xe91657e15230bd684cbd263e0be862909fce15ed6f2a5e03901bb6d9fc92809f",
    "signature": "0x6e426e56d79d4dcf466c23c921b1e213747474885ad2d2073b5d45e1905e9a4249c59b700b21fdf062ad3f2b889de180e4032bfd83d0d9e133672b8b1dbc752d1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}