{
  "manageEntity": {
    "action": "Save",
    "entityId": "1868183143",
    "entityType": "Track",
    "nonce": "0x8fa965b8fbe4ff6670bc9557707b2fbe4a5e5fbc48271349a51ebb22a8963e5d",
    "signature": "0x7695d4a44e23711b03fdc29c87c6516236d7e18a742f07f8a09194e38bba01db5c4e1ff3ff8b97ae79b14813caac423b0b0c448feae9c0f677a54efe824928661c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}