{
  "manageEntity": {
    "action": "Save",
    "entityId": "109508",
    "entityType": "Track",
    "nonce": "0xbfd00513c3cd5426dc963fdc19329281e4ed1d2b4b9219d38c3e4c1cdf519ca1",
    "signature": "0xe382e2cc98ddabb3cde2be690a3e152cedb682e19de47030d8e60c1659e1c0ec4a208f5dbaa5591c3c2b91aead34d1d2c22ebe0e8e82376578369f0526b1d3b21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}