{
  "manageEntity": {
    "action": "Save",
    "entityId": "1740456347",
    "entityType": "Track",
    "nonce": "0x815f8b8640ac877cab2a6936c699e6407add323d3ed5eb551034c5c11c537047",
    "signature": "0x5039a317cbaf038aa461c39d6bf16c9e6a43a334cab4bfbaa776424459d58b362b8074ffdb6e9fcc0846834a5ec8066e80685d30cb4b0d3b3f817d539d2fb14b1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}