{
  "manageEntity": {
    "action": "Save",
    "entityId": "1195002179",
    "entityType": "Track",
    "nonce": "0x20b4e74dedc600683385d852ba13d9e6d1432dbfde80e7de3f7f531cf2d7414c",
    "signature": "0x4189b0277d91162f8c5c90361259639067761c3e68c1409366a0dc34f473fdcc1349ac1af14ef26ea222b6f086ec8465dedc8c231ea957883590a83bf9ea799f1c",
    "signer": "0xc800CD988B7943964EDDa6e2A8c156519Df0E6a3",
    "userId": "171404493"
  }
}