{
  "manageEntity": {
    "action": "Save",
    "entityId": "57958854",
    "entityType": "Track",
    "nonce": "0x24e79a24a95eb5e02e668a14367e58817880205a7f6e6553a938ea4c0322bb1b",
    "signature": "0xc41aa26f3d85379f59950f9f9d932899453325b0d9ad5c9153a942891abe8e8923f034d4c7badb2d6038981100be215a6d20c3e5717fd85d2b117882f0ac12c21c",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}