{
  "manageEntity": {
    "action": "Save",
    "entityId": "622878392",
    "entityType": "Track",
    "nonce": "0x11f29ae2e789dec39925a3c792dd01137a7dc3b768be70c534c8df2164ab4eff",
    "signature": "0xb0cbd68122c0490343f74cddb4938331bb3f6e1a5d06002f89837128d6d935bd43b8b3220d4b96206777b38c1aad98b93b2c20b4d5100191389fe42a648c0bed1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}