{
  "manageEntity": {
    "action": "Save",
    "entityId": "117421605",
    "entityType": "Track",
    "nonce": "0xac4c91e4c1019cb316f336c13ff5a5d0c4b8986a4dfe821df29d7a60b9913ab9",
    "signature": "0xdf376cce41e6940713b83431b307a72fa7fbee3e9ac00820977ff3f4c19c522a2f2d04ee806621297114c2affccabd1a8b430ff2145d0b100dfed6afa8c299311b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}