{
  "manageEntity": {
    "action": "Save",
    "entityId": "179498681",
    "entityType": "Track",
    "nonce": "0x6cffb1fbf017844c2ec9532196ab476c18d4686de21515ef1b44f23ee6eae684",
    "signature": "0x99979335c16bf1de48e8acfc00c9693edf51ef8de133a5dfff105babbf55d98036c30cd43ccc7435e6ea6704e13f9617a28fbe28f5f178cd7c2c7ad6bf706f6d1c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}