{
  "manageEntity": {
    "action": "Save",
    "entityId": "11737899",
    "entityType": "Track",
    "nonce": "0xe49bf88b9da30ab5b2919e0e34758f2b2f3381e46905c71b51e9b838864bb4c4",
    "signature": "0x9c34d31b126786966d83808e4f21d0f14651af0fd205bc4597e2e453cc76ce4a152711009a43401b5f455e4f334f91c4e46f38faaa84fe810593577eb37257a11b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}