{
  "manageEntity": {
    "action": "Save",
    "entityId": "2132880140",
    "entityType": "Track",
    "nonce": "0x84fc5fa37ba9c73f2509c4e441686adfd1b5b973752e26e6d53c716a1abbdd76",
    "signature": "0x154aa45f3b0b063e039055e34fa71b79f742bc3ab0db8cb1a5b7d1839fdb12c530664896b1600a8d9b1759b3ec469acb3594a4132feb2ad960e9a60f2549dfd91b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}