{
  "manageEntity": {
    "action": "Save",
    "entityId": "747752390",
    "entityType": "Track",
    "nonce": "0x5e0232578931b9792c89c50672b5b107e235b7022448d237984f1b4af37880ac",
    "signature": "0x0c71179fa36b83a33395e7661202c1fd3a49c3d7865d3b392f23e03eb24116241394f6998f61e16dbabfb29833479ee3f592f727e19a01f61d0def3a8c2f48201c",
    "signer": "0x05aba01c97C4F182D989670622abE9c797782dD2",
    "userId": "508263176"
  }
}