{
  "manageEntity": {
    "action": "Save",
    "entityId": "976392752",
    "entityType": "Track",
    "nonce": "0xc6579311e9c1c1ed7dbcbad7d563d3c84f81f06554ee48befd06f99fc812ba41",
    "signature": "0x3293641400f7e1381f3a809d3e282be79491f3d446dcbb65e50789961f1c95a91820b11c49cd589f05d700ca728323eaaa0dc108d75f151a81bac2f83193a3e71b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}