{
  "manageEntity": {
    "action": "Save",
    "entityId": "469165758",
    "entityType": "Track",
    "nonce": "0x45fa5c97609d3fdadf5a02df6dae739e3d03e7b1c23d7ca1b2ea0402e16dda83",
    "signature": "0x8e0642b13529d66b75bfa93005388c24d97d79b0fd85d27f1b7cff36264baf2c1351da3506a67bae1207153a4357699cf41761b5355fa230bdde8514a197322b1b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}