{
  "manageEntity": {
    "action": "Save",
    "entityId": "1766646835",
    "entityType": "Track",
    "nonce": "0x4b514c3e71d53a87849c2c0074313522e4236369079cbacbbfc59d0f3fdb240c",
    "signature": "0x177e76809cfa4ae21af315173e30643e880bc31879e5584331cd505ad779826c46c0ae05b54651c159551ec76a0d9212b96ce0d514c01903a47cc73867daac641b",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}