{
  "manageEntity": {
    "action": "Save",
    "entityId": "506928485",
    "entityType": "Track",
    "nonce": "0x86e2dbf57b081aefa0327fe839e0dca5f4a948b5b1e728a7515a59f6e541d778",
    "signature": "0x0a0212480012f6dd8e3bf2a7893f76c21cfff3bcbdbd6018c13a3914c44d171d332fb4f656eb748a4ca3d426a458bc1dcdde12db3d107bbcd2a9fc20877b77c01c",
    "signer": "0x809Db232a6131f46553BA571FB17bFA2cc58aeE9",
    "userId": "351386054"
  }
}