{
  "manageEntity": {
    "action": "Save",
    "entityId": "1461978489",
    "entityType": "Track",
    "nonce": "0xe0b780d406e52096ea6bfd7e596f8e0e1e0d6a72f5677a7a585b41f9d77bc063",
    "signature": "0x0fbf7287956f7273d0791b1d55cd7fd60c4e4e33c61d62127997a6aa17bcb20455ab76b6eba4dd7a702a9e3a33f3d4951736be909a5831c440b5e191e6216c481b",
    "signer": "0xd85E4A094e4C057572A9D525C9737051A17ab609",
    "userId": "696716320"
  }
}