{
  "manageEntity": {
    "action": "Save",
    "entityId": "1249633776",
    "entityType": "Track",
    "nonce": "0x99c0d774e38c47d222b2f6cf0ca823946ecae08a2179b94d4802867f0cf6f8d6",
    "signature": "0xdfb793a2849d81529142aac3542bfc1e769677104bbca09d3c6a36a457b6eca55944714f3af67729923f5ac3ebddc9b1b098709e093c7ec9c97560a08c9bf3f71b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}