{
  "manageEntity": {
    "action": "Save",
    "entityId": "2019328557",
    "entityType": "Track",
    "nonce": "0x793ecfdf89e05988591bd455c5dc5724426c015f113d0f36095f9863bd6d135e",
    "signature": "0x9bcea5bb01e26a7281b823ea1304d50dedaefde113456a46c27c8e205f2505c024b5d6313595147c28289578a510203e2bb0bb93e67aac7acb9f9516873913161b",
    "signer": "0x6F66f681e2e3f84ABb456ddC94785dadfA3E1B4B",
    "userId": "677737335"
  }
}