{
  "manageEntity": {
    "action": "Save",
    "entityId": "410145253",
    "entityType": "Track",
    "nonce": "0x592c23504a77e035d43618ed36a9acff389fad32cc7a8fd59d86a07cc954b488",
    "signature": "0xd46c7a580676a1f55b7f6b51d5708e7724613a0c59260198f7886854ad0ffb8d37a85685745955478981eb0a824a318ffc623545f59f2576f3a99b8b9fa596b21c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}