{
  "manageEntity": {
    "action": "Save",
    "entityId": "690943",
    "entityType": "Track",
    "nonce": "0xd0c3c0f10238dab38264c988047f3f39e074d43a88ab152790b521b139c7694e",
    "signature": "0x4856c11ff58add11f192f0f750e0b6d75701724cf28ea3b324652307165a991f56d046eb5286fca8bb6724947e1e09b133fa2933a4698182c819684c9dd97fb21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}