{
  "manageEntity": {
    "action": "Save",
    "entityId": "544735981",
    "entityType": "Track",
    "nonce": "0x0b9bed7dfc8ecd1f150ff1652bb2188f33c4b7dada7afae15a900e2ad9dfe6bd",
    "signature": "0xa992a5b765846ed8fc6cec1cd7c923860a4bd2f32ede86cff2ff1749fe0c516b3bf34cf14b9dbb074fd999b665fe4151713d9a59537e838ebd814b4b400f643f1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}