{
  "manageEntity": {
    "action": "Save",
    "entityId": "574353602",
    "entityType": "Track",
    "nonce": "0x17cb063cb57a14eaa4451feac00226b4ef224da1a4f69c4baf4b5761dcda1b41",
    "signature": "0xb2e35ce8a973beac646671869d4055a655f8f5ac36ac020e31884977cb43165255dc03301b88c4989200f58439e3c37a4fe31ad304dc43d37f52adf7c22efc2b1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}