{
  "manageEntity": {
    "action": "Save",
    "entityId": "1372833769",
    "entityType": "Track",
    "nonce": "0x87f032356c046c65a33b3317d87fa9ad23248a168c3bb2e21376eeea79efb208",
    "signature": "0x07b940a08eb97879824232c0001eea715ca3fb0154ac4128cb5e3739a54dc76407f0de717f2f65ad54312db2755b9e587c27fe9050e9834979dbacb46af3f8b41b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}