{
  "manageEntity": {
    "action": "Save",
    "entityId": "267956",
    "entityType": "Track",
    "nonce": "0x3d906c499964e3881d6c9f7172bcba953d381867aff4a0e6d472b3ad8c3d7a02",
    "signature": "0x833a08f18480284472bc12631ee46dbec025eff4cf2abb33bafb4b20a94708697d5472a02f780b93ed59a327f5405b9da66e4102d1bed2abbfa8d1e1963881921b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}