{
  "manageEntity": {
    "action": "Save",
    "entityId": "894112920",
    "entityType": "Track",
    "nonce": "0xb67902dd179f85d3d4d62b6ba68a4c5b86423bed53b2bd9ef50f0323ce1e969f",
    "signature": "0x4dc0c655c210456bdbca6cc3e4a487cb3d66d5fad7bb3aacf3f8acd9ccd13d364b07da93a768afc6df53ae917552423a18c94091d8b44e9412029479f20be98a1b",
    "signer": "0xD0f51E232A92DDc965FB1FE51d04200D15d10fc1",
    "userId": "536634479"
  }
}