{
  "manageEntity": {
    "action": "Save",
    "entityId": "1262322467",
    "entityType": "Track",
    "nonce": "0xf910623823764d0e9234a32cbb0d6238acae8605d055536dd8ee9bc22503f691",
    "signature": "0xaf4c28ed2291aa5f28d93a264a9215582ac4cb0a8a4b39fb81e801367b323d7f1145b8c07f9fb3334a9d60a28952a181c43830b1f28d674aa9330cba626479061c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}