{
  "manageEntity": {
    "action": "Save",
    "entityId": "1959642706",
    "entityType": "Track",
    "nonce": "0xcc178acd05b980d29d41072344f60bd00ca6fc288c53a590976f374da4a297b2",
    "signature": "0xbe2ec66b87c3177395e37cb2f6fc20534cba5c6c5fe0ea63e849e208a19078306d6aae0f0681182b91e8a2e42e15018f659ec29e1d64740f70a60b5b28a067541c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}