{
  "manageEntity": {
    "action": "Save",
    "entityId": "813769283",
    "entityType": "Track",
    "nonce": "1792393688272189392",
    "signature": "0xb8aec566c21a2e0442a21b4422f5b9e8521f80ff2785c2562b5f47111e653a2606bc833eb6d9be997dd7e8281138c190120418e6adf7397f4d26d757af55b84c1c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}