{
  "manageEntity": {
    "action": "Save",
    "entityId": "1417738678",
    "entityType": "Track",
    "nonce": "0x01a924424e5ef00d028f08beb0893845d226ea397bd4f0d6e42e3d5d51923941",
    "signature": "0x441ff529cec0c20564d88571fc0e97155eb74550f574eb7868ede86047bdbf8725b7b2d81bfbba9d06f27c9752870e6f662cd060389e751dfd77362a6aa599271b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}