{
  "manageEntity": {
    "action": "Save",
    "entityId": "1564444272",
    "entityType": "Track",
    "nonce": "0xbd92018e6f16e006815c698a82f9e4110ef689b0e3775ca1538b3f11a44eb959",
    "signature": "0x415afed9e2523106e70828996000172826033bbac5481eb8df78e8c8b01af1205cd5d05caf3c02e251324d97c02caa054a35b0349ea70227c5c089e7d86bcb3e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}