{
  "manageEntity": {
    "action": "Save",
    "entityId": "835424707",
    "entityType": "Track",
    "nonce": "0xcbf7de2af5637a27a2628ba765e11aa799c48b42f21838e1e6bc759e3858ba7e",
    "signature": "0xba331fb8ddf918ea6d3e2152e537e1d5545286677b541601650f4160feb3bfec2d15ff740fec25878f6a8a148b9e485a67b46c02a2f30324e99b2ce28e8732051c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}