{
  "manageEntity": {
    "action": "Save",
    "entityId": "281750208",
    "entityType": "Track",
    "nonce": "0x7eb23746e6b69033e99e453e70aedf88b88ab904b1a39cf18dd150abed975cd8",
    "signature": "0x26f75026dbc819b4f0237fe90369b7b98c04f1510fe20faed7a66ec958cf139a27a5eb326780261bb318d998a3a6cf5ff57a8898f78812cb15c547271960fcfe1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}