{
  "manageEntity": {
    "action": "Save",
    "entityId": "1533764144",
    "entityType": "Track",
    "nonce": "0x261a5892d62053b4eecd583e7a19e76a3bea090428e11f8311fe86ca41ac5071",
    "signature": "0x702830908e8d402c908afe147c3db47879fdf138b4b5e012bd4f0ed9cc8834526b0e595b660bac033cafe816208730eebcb07c138f099a3147c1b4ea516a4cde1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}