{
  "manageEntity": {
    "action": "Save",
    "entityId": "841616540",
    "entityType": "Track",
    "nonce": "0x617e1b930949c19b271d938ac343ce70a86b02fb94a3dc09b993cf0b7b27b3d2",
    "signature": "0xb5c90cb99f294e67122ce64b718283689fadb8a5d1deebcd9c4112b68fd368fb232775b2244796a5381123a21911e116c6e82a4634cb8887416b3e71598eea301b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}