{
  "manageEntity": {
    "action": "Save",
    "entityId": "1323783414",
    "entityType": "Track",
    "nonce": "0xebd87aad6c0ca9b8ba7685f87d5afb4fa29107d8840c88114db7c0d87014ead3",
    "signature": "0xd2178eff84d2c41662d7dd33fe94bc46954ce4f319ef8afae063e13fafb3c20e5feaf7ebcc92ffee35bc407aa034277168746ef02039101f68a24def84ba58bb1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}