{
  "manageEntity": {
    "action": "Save",
    "entityId": "841049287",
    "entityType": "Track",
    "nonce": "0xe4a6dbc27569fc9138ac39a954851350f256fb58736be19698fc7b3e6fd5bf08",
    "signature": "0x7a48387370b7a3ff76b4742eb06af539049fa9eab69fff07352fd6c11ec40f5628697630d1a7f5808d3afea83e1da91446fd41c9ac4deb7bc58a5929d2de08111b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}