{
  "manageEntity": {
    "action": "Save",
    "entityId": "1358936532",
    "entityType": "Track",
    "nonce": "0x7283e667611b9cbd43f950424a1ba93cd2c09b7e3ce73d06578585e1fd7a631f",
    "signature": "0x60c5d4c08dfef2637900b8949838a89cdb084076d9879d22edd20593fa0ff05b117122b8ed630ce0896ca83e2a323a7aa4b660aff88a122aff17d9c22a88c6341c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}