{
  "manageEntity": {
    "action": "Save",
    "entityId": "2009868392",
    "entityType": "Track",
    "nonce": "0x4f04c2b9019195f7d836158dcaebf7c9cd5c410fea11db500ad4304fb094aad2",
    "signature": "0x71a2cd683c1688a28eed2ab972cd5aa09a3215225c66cc127a8a4a72017589ce5c6601120f550ee2ae4e8e9c1e71eac476e7a0f807fb0130af340fc3b7ec84e01b",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "20"
  }
}