{
  "manageEntity": {
    "action": "Save",
    "entityId": "1364296998",
    "entityType": "Track",
    "nonce": "0x8905489d84e22bf407fdd86e119c124469723cafd73224e3a8a62d237d4be7fd",
    "signature": "0x80177edf56056038b87f996e684febbbb39ef57dce39012ea8b93731dd98f01e0e9f7e03de307d29c1edef4384dfdcf2eae080e316b7e4bfb38256f74a5d38241c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}