{
  "manageEntity": {
    "action": "Save",
    "entityId": "38717644",
    "entityType": "Track",
    "nonce": "0x2759d4466a5270bb866fbfa4a27ffaf2c043343ef795ff0313c178158a8db14e",
    "signature": "0x7f5f8abbfffc888443ba79194ee0fa261502e2df373783442fbfb8b317579268220e56f4eacdfb5279d162b8284116f808851718f67d674a9da62f8679d165b21c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}