{
  "manageEntity": {
    "action": "Save",
    "entityId": "857227142",
    "entityType": "Track",
    "nonce": "0x47d33dc0d8634231b7a41ba759eb7bd91e0fd8f62debfc3263101e07a99b8251",
    "signature": "0x7bdf8d7fa574715210603e6ceb19fd845beb7271424f26d4c709af140f889ba21e4b7541182fd018e9ef2b315e7d28698196b2a7550b802196112f3a9ff79f3f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}