{
  "manageEntity": {
    "action": "Save",
    "entityId": "1533503154",
    "entityType": "Track",
    "nonce": "0xa32a95034029e1533dc0ec29a7bb59d6358bdaa998f018f7c7bca0081fc552fb",
    "signature": "0xa2b948898513dd3d7af0e698822fdd35c1c0766e6a585eeb3460aa176cb0567e0f9de265748d0ecb61951821dec28d43bc386456f7038940cbd0686034c0fa0c1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}