{
  "manageEntity": {
    "action": "Save",
    "entityId": "1384831695",
    "entityType": "Track",
    "nonce": "0x003c44555e8fa52e8c90a401c7561388f6cb5fef4bdd651cd166c2572626874e",
    "signature": "0x7c921f37c1dc95fc6d0e1d295d228d2ef881ef0ae85b73062c8526914fda752877c50d539b4300e4002cbc37036ad71bd4b7364712e14f050153deb313ea15211b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}