{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834009761",
    "entityType": "Track",
    "nonce": "1786482558553956521",
    "signature": "0x4d567e0068e7dc3f666b00a688bfad644a49c7c82a73a24051f93178938fc2256bb4e05c2283ddbd5269584365960b758fa3b4701c60a4568b461b2c7da8c5781b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}