{
  "manageEntity": {
    "action": "Save",
    "entityId": "331814374",
    "entityType": "Track",
    "nonce": "0x5821637139e938977f5e40c627652fd8ec786b74c7f5a92b84f4b2b61ed50c2e",
    "signature": "0xd341a0b76d4fd3d30b90408dfc06f4f7a87c7f52ab09712a6ba016d67a33630741386ed958b57d72a9ccedbbcee68d34895084a85efe25530ca9a8cddc3e11931b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}