{
  "manageEntity": {
    "action": "Save",
    "entityId": "183485",
    "entityType": "Track",
    "nonce": "0xe5873be1b7d825e27ba7b913a10a1f8761d18686f1210971fe5e3cd1f094f655",
    "signature": "0x749cff8bda3ffb4077ea7c79874cf80cff55a143895961c57c8fca4476363373745cbad2345f51b1ea55a2921411cee2a6f648e4383805869958b755c770141c1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}