{
  "manageEntity": {
    "action": "Save",
    "entityId": "680797301",
    "entityType": "Track",
    "nonce": "0xc64a4f7c44815cc9bb9de5af085f83006ef9844d515e8862dcdacb262c3330e7",
    "signature": "0xfa62e7fbf086bc4d5411941022d22d8f27b15356778c9b44e7cab7939532960843abead99030bee2df8f34d71091178b561e2a75792461ed50eea3b451ca06421b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}