{
  "manageEntity": {
    "action": "Save",
    "entityId": "56441999",
    "entityType": "Track",
    "nonce": "0xc4efe9375dc95f860901742029ba63bec41987375615ca52bbabd2bb33adf57c",
    "signature": "0xacd8c59fe8890526c963ee84c3dab8f6ce45796e346b6433e84e5d44af1256a2728d4388ae815f374ba3a405086c1b5ded854bfa36f5973228b74bc523b60af61c",
    "signer": "0x7ceA71B4A8C4013A4f57c1A57eC0430915572e86",
    "userId": "31724295"
  }
}