{
  "manageEntity": {
    "action": "Save",
    "entityId": "1259341653",
    "entityType": "Track",
    "nonce": "0x5d0ad085ccd1e290e3e7fe35512b15b64a9efab7cd30833459c0bc6477e053e6",
    "signature": "0x3ba891bf3ddae90f821bbafbfc7fa25f6eab2339966ccf5f1d3f515efb1a697d1ae28133e517c76ef7189929fd86c2ac49f5d2828fe4866d42cca8b47e7b13fb1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}