{
  "manageEntity": {
    "action": "Save",
    "entityId": "815539229",
    "entityType": "Track",
    "nonce": "0xff34ece99ec11849314a03810c99ad1feccc74d0443d2b581e6edf74bd056792",
    "signature": "0x08f14b45624f5efcf1313e66ab34a57d9ea1d81861b6ffb8494801ddb26f5cd96ad41766d5edebd9453ad7bf7724853920d67a71624c8389de0f98be80dd124f1c",
    "signer": "0xB18b1793545F350C53589f5BA9BfA143b7F15eE5",
    "userId": "417591612"
  }
}