{
  "manageEntity": {
    "action": "Save",
    "entityId": "530756",
    "entityType": "Track",
    "nonce": "0xeb406bcbed9d25cef8719089dc06e39f8e371a7b13365c11ee58becfdcce4cb7",
    "signature": "0x8018bdf1eaebeec0a9435f45e94fab6bdff761b33cfab12edee03728385b3ba149bd533cb2ebc5119d8dce9730099009caddfe1ca65ea263bb4d4cb44005510a1b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}