{
  "manageEntity": {
    "action": "Save",
    "entityId": "51752441",
    "entityType": "Track",
    "nonce": "0xd14f0edc0df6ebcad0aaf4ab64c87e1c90b848c3702d965ffd2b5c1903be6b34",
    "signature": "0x1383fbc2520fbcbd671edd088852fc1f722964f9f01f42c2dbcccef13b6869a11bdb825931c98dbe3cdd69663914cffdeb93b51c41d79b2d1e09ab70b4939a751c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}