{
  "manageEntity": {
    "action": "Save",
    "entityId": "467429894",
    "entityType": "Track",
    "nonce": "0x6ffc9b0fd5a070f3e58b78dd553d45e70fd4d0e323f75dba18cfbe8ec27ea39e",
    "signature": "0x989e797cc0dcce6d8025a521156eba7a1e5a019bb28e8776bc40e31c3c7bf0a16c0180f7ab19ae6fee294d85645ce33356a4ba75d4af838b2d8b16930f32829c1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}