{
  "manageEntity": {
    "action": "Save",
    "entityId": "1337077823",
    "entityType": "Track",
    "nonce": "0x1be9faed2bbbb42a26d4fe20664dd8a7ab5b56cde532099960aa62275319c09c",
    "signature": "0x00496f23e43dd1ca9065807f4860eb416af2468cf1941e3b712fedfec130ffd95f183714612e0bdf90bd134391885403f0c78a2abeefb3202a22bcb465aacdf51c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}