{
  "manageEntity": {
    "action": "Save",
    "entityId": "494463206",
    "entityType": "Track",
    "nonce": "0x1175cf78fed5b3bc30187ed0a9ad4c93beb1d54a1a57afbaf4898974aaa0f92d",
    "signature": "0xee32da79fd6bd7590740326d561e98c489ae4df7bc160cea7a72d010b41e524645a353cdad86090e24cb642f3aa9b9e839dc4cc6ad5dcb76c3cb9f846c2f44cd1c",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}