{
  "manageEntity": {
    "action": "Save",
    "entityId": "1077740",
    "entityType": "Track",
    "nonce": "0x651890c2749892b86e90d1a1dc2dc1dee2a7f91bac59f9973d5f061f68e2cc17",
    "signature": "0xcb3ba2645f73a99e5101dbaabe65c26b29f6cbe7f4a4756716ca88ef8bad7cfb59d98ac3c2f16e777b9a21d92a5c5d7a5c0a2498283ea6e5ea7e6275fc8b9a521b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}