{
  "manageEntity": {
    "action": "Save",
    "entityId": "494223084",
    "entityType": "Track",
    "nonce": "0x56b9d76e4720432455a4d8dd2ce28be23b7baf8f8fd21335d042d03b11b356ea",
    "signature": "0x4894858d7e5ce113eb4285297f1a3d982596a76d5882beca3cbd8b52cfcc0c24450b81111e42e893eedda6cf9131924c0db594cf3e6a65be9d4f3055c732d86d1c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}