{
  "manageEntity": {
    "action": "Save",
    "entityId": "4817791",
    "entityType": "Track",
    "nonce": "0x4f7ecaca4e0302f366a00f8b69d8f458ce173c57fc8e452fdc22ca6f3ac3110d",
    "signature": "0x9110c2160bbff9285189d75d973a277246702f649a8edaf306072fd2f3108e685a506e1d0328f730cb52233d118198276a56df02c2c7757fb88504260df0a8ca1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}