{
  "manageEntity": {
    "action": "Save",
    "entityId": "1203784760",
    "entityType": "Track",
    "nonce": "0x03818d3c399ac8162597eab4e394dfd4c7df20474bf08abb87bed98ff1451cd3",
    "signature": "0xfa42b94b7e6c7bdcbae546ba7b190681506db57449015e3409afc8cd410663567ed3a6b1cd801d89fa5790fcdc7daf90f795d86cf8342c04ce50623b3403a81f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}