{
  "manageEntity": {
    "action": "Save",
    "entityId": "478127675",
    "entityType": "Track",
    "nonce": "0x3cf5a25c3c736345247f456e057be8c5b6195f1f0cdf7e4c13e85b817ce6a698",
    "signature": "0xf3bc80305597458166cda4d827fbcf6ade2b7cd6e9425125052d0faba08edd9301f5c4ae993f6a6c0f424baab647c52b7fcbbba74bd14a91d4b20742809b8e291c",
    "signer": "0x1080460F21DCc82D7160d2C77DaAb22a92c4dD22",
    "userId": "162106877"
  }
}