{
  "manageEntity": {
    "action": "Save",
    "entityId": "9748064",
    "entityType": "Track",
    "nonce": "0xf949f69332b1037aee231bd6a3f913e840dc86d75ec8833c50fa8936edab39b0",
    "signature": "0xf048e6eaec43a3ee4efb04235cbe1bc0db9e48cffe0abb6c7b186666962a57d16d907a203bbc51a279c61e396ee8aefee7bb0145e887956186b5d006d6e742a81b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}