{
  "manageEntity": {
    "action": "Save",
    "entityId": "393677610",
    "entityType": "Track",
    "nonce": "0xb50cdac5c521d3d5fc171773cce64fe226876505f47b3b51885398bf551b6feb",
    "signature": "0x735c1f954df202ecfb889637b7e9befa68189282acb025a709a26019ab9a08922597f1b766c0929eac4f6880de78e5c6837f2060d5fa2293ce9441169678c3a11b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}