{
  "manageEntity": {
    "action": "Save",
    "entityId": "407686",
    "entityType": "Track",
    "nonce": "0xdf4d66ee54eb2ad07310481da943c5d350e3cdaa748fa3c01990b9ff8e0f76a8",
    "signature": "0x7d4f4894144bf4873b9c38d11ebe3dafd23ed0763b13fed6a6a9834c6f2f846c7ae65a89a3310d3324b0625335782ffb1252a422a9dd97042369c1637c95837a1c",
    "signer": "0x9FF2A7F5Fab732dA57359bb3eD63a95511bD1329",
    "userId": "67863854"
  }
}