{
  "manageEntity": {
    "action": "Save",
    "entityId": "1696475097",
    "entityType": "Track",
    "nonce": "0x4eb2e33ddebc1fd6bf99fe1faa9aeec11efb04c5dc1637d4b71daf8a26fd6ca5",
    "signature": "0x1d81b87b24c7b2d0e1bf27be532f671cdcd19f6e15cf7bab826cbc978442fc211222ad3c65e8c11e8add4a9911971d5fea1ed426d882231399fa212db3ec7f3a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}