{
  "manageEntity": {
    "action": "Save",
    "entityId": "347576154",
    "entityType": "Track",
    "nonce": "0x408f44dd34c240bd9b3d806eaa452dc3a323de68fc96a4046e36a599906a79e1",
    "signature": "0x887ce9c5a4c33cd166294e7ccefd13371d5b5bb41d0a772044abd95b174c584726c5019d0624f753e066b81ef88c381cf73b47fffcc8a89e6baa6153bdd3bc5a1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}