{
  "manageEntity": {
    "action": "Save",
    "entityId": "481453560",
    "entityType": "Track",
    "nonce": "0x9901901d9f928292946b05909a6801e57bf1fba157f29e5308cf49a21a95369b",
    "signature": "0x39d12317bd7708d895c404ee952e5990cd802216f584e9b23c8e1b92fc431022332b1ee893cf1e49e1d3d0adeb039b2db9b265a56f4854647308247d2ceae4331b",
    "signer": "0xa0C4E02f28648143d28Be874070Db2dD5F0b1B94",
    "userId": "95644816"
  }
}