{
  "manageEntity": {
    "action": "Save",
    "entityId": "977184",
    "entityType": "Track",
    "nonce": "0xd9b03a982f7eda772e9a80bca5a26303f83cd9f294fad90293a337e9bcabef43",
    "signature": "0x8a2614eeddad0c3e9c9fd8c7d59b4033c9473db2e83228a1f651272381da52503c05d32755f4a546525b18f736eb5386ea8c2690b81563ba900d06301cd48c131c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}