{
  "manageEntity": {
    "action": "Save",
    "entityId": "132516688",
    "entityType": "Track",
    "nonce": "0x0f9812a8b6222d1bb872ac2e1043464cf2faf557e2d2f3ccbd692b38aaf2e243",
    "signature": "0x9b6fff75a28935f204a0efebc69cd579dc9a968062f117709341938bee8357bc346b2ba2ce66dd2045bf2be5d31bb0501fdeb04c8b7bfa215df2682c32815f871c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}