{
  "manageEntity": {
    "action": "Save",
    "entityId": "2139485514",
    "entityType": "Track",
    "nonce": "0x69da7f1770d12200c5ee77ecd8ee6eeaca3d2dd6540bae4487ad9831615106ce",
    "signature": "0x27c136bda1e5d2807d7ff8701c27faf63a6cfd096c4a27c4593d7c764d748d194de4e24c67070cb34fb5677400937bb2e1bd3cd88877f78f79049e6c61da86b61b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}