{
  "manageEntity": {
    "action": "Save",
    "entityId": "938454287",
    "entityType": "Track",
    "nonce": "0xae0f3b4e1f10be61827fe9ae930003a164412f088db52809914f769ee5d714e8",
    "signature": "0x575c4eb4b0de223e20239f13a32ee042181276c709e47c1f671c47c4f5f1425e35bcfc194f0d6b8e0366ac116edb6ed3fed807cad5e98909ac950803904a3a261b",
    "signer": "0xB10Ec38B72811b76e2F4Af66A7Df9624945d0B40",
    "userId": "358998259"
  }
}