{
  "manageEntity": {
    "action": "Save",
    "entityId": "1223366762",
    "entityType": "Track",
    "nonce": "0x4ef760f3def9ca013e6efc147b69b1efbf79f3f0e86fa4082dab34021a180f64",
    "signature": "0xb7399e7abbd3a4db79190bb8dbe88a31635b6dbb24cc0b033c110f424be803da196c5d296c12b265097f4d872242db8ad509c7e120127ed5c4ed28d21f27fa5e1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}