{
  "manageEntity": {
    "action": "Save",
    "entityId": "266229545",
    "entityType": "Track",
    "nonce": "0x41f07b18fe19b8b493412841a3b6491467e8a9ba177beb73d7bcc9031aa57ad6",
    "signature": "0x595ae8ed4f452fa79ce626616fcf47b736c20e95722e426ff751f622124bdc7325bae5931e0d5ca8077ade4eb7a4d3523c1fbbd71460597c6019b2dfe241855c1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}