{
  "manageEntity": {
    "action": "Save",
    "entityId": "1658895035",
    "entityType": "Track",
    "nonce": "0x037602eef29f92d450cac3bcf700bfe4de1cf41f518d55835bb2234818390c6d",
    "signature": "0xb5967f33e02331634b1a85f089f950da909eefca5a4249a41514ce81c1f559af7f12a1b8cbaafaadfc82e695f1ac44035533da9a5bc9c24cee1d2d4cb598f4ae1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}