{
  "manageEntity": {
    "action": "Save",
    "entityId": "775880021",
    "entityType": "Track",
    "nonce": "0x627b56a1394380ffb26c2c938d31e2c4850ec41e1fa68dbfaaba666c04fda479",
    "signature": "0x2339ace15bf95a561b28ff9abe6d6b52e73324ca62382af2cce2955b40bdcc79081c6c1ae2fad3d65122c2034cfd85ef4beb8b8da5d2e1ad7f2214a689808b401c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}