{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458282510",
    "entityType": "Track",
    "nonce": "0xbcf2c6d5abcb53c42c3cc364a059c705a8ea4665774c45a80e1726058e6d4a56",
    "signature": "0x57f54c09b8b4f47f416bd4c0116eb26200c649750437bbcd9137e16c1a94098c2afab3daa26124e98219aa2683cab50720ad97125b3cf3d11fdeb767b3c1b7c61c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}