{
  "manageEntity": {
    "action": "Save",
    "entityId": "336523",
    "entityType": "Track",
    "nonce": "0x8ef29647225daee0f964ee604111779e3af884410df7c594835e776427b9aa54",
    "signature": "0x421ddc81d7b90f0e372e2d5e593ef900aee73150adb1a860a05320587cf611dc4313e60967d3c8325b035bea40dee05fc5c360988c1bc3b622fdf68bfb50f85f1b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}