{
  "manageEntity": {
    "action": "Save",
    "entityId": "552969743",
    "entityType": "Track",
    "nonce": "0x5f9d0999755217d64a2809bb140afa867a8f3687e7bc7a050af536d457fdc818",
    "signature": "0x1fa4bbd303885a02cf2a3ca16b376050d3a285a0e1cb1b512180ab7c780100106fe0cf1986f20c5045b276221c54dfcb6fe38cab73232b43c46d4f7fcbf29cb61b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}