{
  "manageEntity": {
    "action": "Save",
    "entityId": "391927662",
    "entityType": "Track",
    "nonce": "0x8d5905870d213e73036c026586a04c4daceade98fcf1d0080143fc206b3e2608",
    "signature": "0xc56c1e6961a1271c4449e6d216b8aafdf118fcfbbf69bd2627822f9988b75f9c20171b4da8f720ee417aa69c9cac475d9ff96a1b0aab4b0b4774300f35d777651c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}