{
  "manageEntity": {
    "action": "Save",
    "entityId": "681616481",
    "entityType": "Track",
    "nonce": "0x35a1078515ea58d5e7154fde41de5b796d25f10477e28c1822fb5213f60e1fa6",
    "signature": "0x3155de6d9a4cc76a9dacaf50630b3dd5be4454d6a4dbc137d4207efc68894be443ff650fa51a797da4b195b95414f7562fa38e0de6ab9164b9c7150d08b5dd0a1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}