{
  "manageEntity": {
    "action": "Save",
    "entityId": "306789127",
    "entityType": "Track",
    "nonce": "0x869e3d418362400df638c29266bbe429b52fb44c2775a574d8079d3d61dd40e6",
    "signature": "0x247cedc354fc1b747e9ed208a755397ad6502158760ddc2fe7ba94c635c3fe085d07512ce3f9ce28a1c352bdcd1d75a2a481f731a8beed3b8ad814220356d1861c",
    "signer": "0x853C19e911C7E14B6A188cF2acB47f8acA6c8e2B",
    "userId": "705251640"
  }
}