{
  "manageEntity": {
    "action": "Save",
    "entityId": "249706",
    "entityType": "Track",
    "nonce": "0x03c5decab04ebe0c74b593f5aaa6160acdde5c118a0969497d3431b5416b88db",
    "signature": "0x0d9a9b2a485ec8a2e8febcf06d244889209c17ddc49c736abba40e51210388c66cb2adda768c8ed84ba3206733045924bfe8013321a8d34da6569f88c7e473a11c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}