{
  "manageEntity": {
    "action": "Save",
    "entityId": "1490110178",
    "entityType": "Track",
    "nonce": "0xbae3c6c0eb4d5f37898534c2b9437bec33ee577141252d3c06f4dec5f325b801",
    "signature": "0xec4ca55b90aabc411324d08f26173af616c7fe0e7d6ee5a0fb7057dadd5cfeb70b30f111cea667e7687ca45ec1691c474a761bc1538624b66e826b2fd2a8f77a1b",
    "signer": "0x4e636627B2C38e64C8D3aF5889767393B4fE6C1A",
    "userId": "181"
  }
}