{
  "manageEntity": {
    "action": "Save",
    "entityId": "1582480407",
    "entityType": "Track",
    "nonce": "0x868ff17d7a70684081ad0a231c3041b6af743aaae9fe23e50201d3c9bf2ad9dd",
    "signature": "0xc42e80abcfe25e76b032e2712f0563a109b8fa8f56866832c1e3e7f9f2feb03754d705c6b5c65975b768e2a6c7f08dd35a38e4bf23b59e75f7a0a6ffb667dc9f1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}