{
  "manageEntity": {
    "action": "Save",
    "entityId": "1953844069",
    "entityType": "Track",
    "nonce": "0x6bb1fe01cb51992634756bd1b335736b23fc70471c4908b15b115befc0b1b72c",
    "signature": "0x5d8a23aac7afab7f76f21e8ff12d33cf5966fe562172f636a637e07c4ef2e79318a99ec0ac550d6f425d3685ee0374b0b1b67c0edc15fc41126bf29cf30d26171b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}