{
  "manageEntity": {
    "action": "Save",
    "entityId": "870008659",
    "entityType": "Track",
    "nonce": "0x7c879195e095f8afd85ed0af0057a3bb7c0710c7d829dc6a5f793866b64dc411",
    "signature": "0x8a841b6e06776f9bc38d025f251de7f46ca6463539fefce02fdf71081f8e798023a0bc7d008a3315cf185f4fa6a51f1aff11363a888499f43e84051397ebfe011b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}