{
  "manageEntity": {
    "action": "Save",
    "entityId": "1394365394",
    "entityType": "Track",
    "nonce": "0x378e5df838fcdd0d9af69f80e5407f156d4bf6960b75ed27c14bdc3e95f21b6f",
    "signature": "0xea91d52c7f06150b1e16650151a82aeea7d7b2a6ac4f2a9702f7cd5b9951a4d6220be17b4e34c519ca87467e03acf0b7ebddf339372a01410c013bcd48346de91b",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}