{
  "manageEntity": {
    "action": "Save",
    "entityId": "118591",
    "entityType": "Track",
    "nonce": "0x62980ae419c59f1e6ea3b7e279691205a0a8077f63f667b82c19a4612217a3a7",
    "signature": "0x935190e28a7642bb19ee83d6222ed815a11edf46b66063a22b02a0ac915548750ebc83701370bad97898a550a115f51a1848f37a832d0bcf0985e9c53c0206c01c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}