{
  "manageEntity": {
    "action": "Save",
    "entityId": "2064684505",
    "entityType": "Track",
    "nonce": "0x5f85643b942c748e3db79de16c37a0c89a9822c517d1cc03aa29c735805d579c",
    "signature": "0x0f5793f9ececfc8b9f7c2f0ab12c53b6e5d6e566813e885104c6fa04373498087ef9c0baeb9d64d44d2e642eb2bad50aa619b9ab09ebb6af4999d3cb46f83cba1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}