{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142787428",
    "entityType": "Track",
    "nonce": "0xea51a1eac04df60b0fc13ea5e20360991d88f6889b232acfc753f3deb3c2d496",
    "signature": "0x564c0f639e93abae160399c8947e147bdf2877d877f9ba9dc74770a34768ad7d6f04ee2867799f83856e21ec2f4bb8f44c390cc02944581712a9accdaa764b781b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}