{
  "manageEntity": {
    "action": "Save",
    "entityId": "722702556",
    "entityType": "Track",
    "nonce": "0x1f25d3b1d19f28058039e3aa3131ff5afbe866aafd9d5f87ccc0df6d6ca342db",
    "signature": "0xa6b54b595aa7086aed827f3a69cbbeb43413d86a54495890e2663c8b4c6f963608d5c71cb672bb2e8a8e4e5900b9e7963d2dbe712d61b4c94c2f4716d4c079381c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}