{
  "manageEntity": {
    "action": "Save",
    "entityId": "809784291",
    "entityType": "Track",
    "nonce": "0xf2bac497ee0188ea1d4a0959b56085c0554728b02c5dbf5c3d8353abae29d15f",
    "signature": "0x016e29d31fef5cacb0cf2b531dbe9f12f6e0a7061d2597a166219942c65d44ed70df0110b4b558683a1e0f0491001c3c3fe9857b2c7862262643e4179952d3101b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}