{
  "manageEntity": {
    "action": "Save",
    "entityId": "432768309",
    "entityType": "Track",
    "nonce": "0x780008fcb7da4de4f97ff21c4f32d1d948f2859f23c78d23beb8ee93dbc746e8",
    "signature": "0xb62ad3a64d7405454bc6852fd2a500c9aae1f07c1cecc4641214114e59a60fc14bd958aeb93f4e206c36f7bbc9c9d965429621b216abae71c38d0cc3dc5055a21c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}