{
  "manageEntity": {
    "action": "Save",
    "entityId": "774995420",
    "entityType": "Track",
    "nonce": "0x6fc0e23d722d380110f23b6199d2e1be1ff6e5085eee00593159f9901b8b521d",
    "signature": "0xfba93d867d4797cc4f592df61b23d00f31428407dda115693776859b5786f3a17f62a44c15b6b150d5c6cb295b3e47a08c846364366087abc2b7dc13a95bcce21b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}