{
  "manageEntity": {
    "action": "Save",
    "entityId": "568084095",
    "entityType": "Track",
    "nonce": "0xac0e8f233df4e16912b169f8537a43d9368fce7fe251bec04d51a1b706c11585",
    "signature": "0x3bf830afe0de5fbcac3349bf0ab6e37f782a470116cb70d757060f8e1443f4b6663cdde229cb62e5f2a44e1df43c20f55a2ab7e6d43c8bfc8e3b0546c35560b91b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}