{
  "manageEntity": {
    "action": "Save",
    "entityId": "1994335007",
    "entityType": "Track",
    "nonce": "0xe73ddc13a7722bf709a7daf034a8963ed89120ef52b047923c5526f44627bc74",
    "signature": "0x947416c2e0da54d1384da13e7cb82eeeb020d101338f03d6132359be2b7a382d71d8bcc6f6cad6e0483e4547b271c397c38316737424189bc6cf8019032e11521c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}