{
  "manageEntity": {
    "action": "Save",
    "entityId": "61949",
    "entityType": "Track",
    "nonce": "0xec092985bef2acc0e13b4c736cfc803ac9434f0e5069cdf3350cddfdd13e64db",
    "signature": "0xdf45e2977369baac57ef361d4e72e0f152b984aa99622d9f98eff8195ae3637f77c8f86acb5c5908a77c51f63b733faf203c26d99b9857ab541fe96ce44d52161b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}