{
  "manageEntity": {
    "action": "Save",
    "entityId": "556126943",
    "entityType": "Track",
    "nonce": "0x75e82daf595af81c84807e8b9c072441f36b5b8c573104caad7fbf166a763b1e",
    "signature": "0x25d5de2ebefa796d7c04e9712e597deb16c74a15e3bda3873030ec5c501ba7065216fe9d89cf08fa92f7d41756af0311e42f7bcde98a704d47990f5e0b9d4db01b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}