{
  "manageEntity": {
    "action": "Save",
    "entityId": "717374928",
    "entityType": "Track",
    "nonce": "0xe406c1daa8a8c5ed10361209c3717dffa18435943eb577bc262734fef4fa43d4",
    "signature": "0x03bb763f88bb965f220aec63f3b58c77e7dbb75bcfd231a8bb9082c528f5f7a673e4981af59f8c22ab3cbd1ea76492c0af86bc131498dfdf3da873ae33fb31401b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}