{
  "manageEntity": {
    "action": "Save",
    "entityId": "320200316",
    "entityType": "Track",
    "nonce": "0x792dcc9d730d271244a671c778ca33d41d5ce4663d20a96d1ff8b5b7e2697d88",
    "signature": "0x46f92a46d1a6637071f0675f699eaf9aa3d24a48aa1d9e5230012921d3099f9268a430732e9d9793716f914faa22d388ffd4669a283da7838084488427bcce7d1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}