{
  "manageEntity": {
    "action": "Save",
    "entityId": "910087816",
    "entityType": "Track",
    "nonce": "0xb45def8c42c25c8888dc9cdfd61ecca94830955742a3ca38c35d262e9b3a9b05",
    "signature": "0x5ab67e4edd30a26937482d61c1d874399924ed72f42e1b03008ef4a78d504fec0ba6925e5e109e71101b3c02fdf1b0212071d3b6fa3b44d4a20486f679ddcf4e1b",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}