{
  "manageEntity": {
    "action": "Save",
    "entityId": "105021",
    "entityType": "Track",
    "nonce": "0x579540ff8229dc409a8656fffccf679053f92ef9974d83b6db1726495a446e87",
    "signature": "0xe1ce5448db2cd8cf91a034dac160bc20c488b9b70be857a4a769c41f35c4aec422af3d01e91697077311fde25445148188c9249dc2927a200037cbd69ca4f6901c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}