{
  "manageEntity": {
    "action": "Save",
    "entityId": "1251113632",
    "entityType": "Track",
    "nonce": "0x972d598e03a4438c1c111b8932e3a2d0f32fa3900b9279fd400bcf33dd565cc5",
    "signature": "0xcb2ba850053f55f66a330ff5f5f85eaecf0f573d6655781038a43c4476a5d3d41984146f5635c00a0a8fce60bba98feebce2f1a6f0c7ac2bca3a8449a7cb78301c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}