{
  "manageEntity": {
    "action": "Save",
    "entityId": "201513925",
    "entityType": "Track",
    "nonce": "0x172a6415c0b83b60bd6441a43828f27eefd76140fb8bc3aa3a15b64ff92ff575",
    "signature": "0x750ee0cd92300f13999303c36cd55d732058de6163af55a8c37f24da08567c87137e0770103f1f4ff1c21fb99af16d088a7638bf8822b8833dc5ef6982c36f6f1b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}