{
  "manageEntity": {
    "action": "Save",
    "entityId": "1177465496",
    "entityType": "Track",
    "nonce": "0x122d3ae24053304ecda328bcb51eb77cb3f10da0c0cc3855eae416d272c2e07a",
    "signature": "0x1d6792232f4713f7c78c9a3f3d9e90f3bc1895f12cff627c07d8d895bf88ce4476d0697bbb340a4f645a5d74cb18d1f54489dac4c9b62cc691cea33e7dc095e81b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}