{
  "manageEntity": {
    "action": "Save",
    "entityId": "437329255",
    "entityType": "Track",
    "nonce": "0x91f9de3b5cd3b002658ba0be66ca1e97e37e48fba35490237285330cd26924cb",
    "signature": "0x71ebd499f842b89f5b011269784f9f4c028532474a8612bb443452508ea6dea158c01be00479fde19e63ddb1fc577b5bbbc8df1e6868e05070661e0fd09e3be71b",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}