{
  "manageEntity": {
    "action": "Save",
    "entityId": "1222594205",
    "entityType": "Track",
    "nonce": "0x4f7d6811a342b3894960dd4b101dbe7ddb95aac7554b7d83e9e5bb9dab23eeea",
    "signature": "0xe261293b29354e7911a415f7f36a88b8f41982a97e98cb4548de67049cd8358f48ab3d407cae9950a9c756e225df2d19c7a112e207f08d9f1d6862fad0c455061b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}