{
  "manageEntity": {
    "action": "Save",
    "entityId": "1535073554",
    "entityType": "Track",
    "nonce": "0x0f55f30c16606202314260a3001515c57a47ca8cf8d8434c2722a1e5b978c979",
    "signature": "0x0d3e8c56e983f860f78b10e6c27adec8b5b3faef796c3e4636434e60814d72712be934c1aefb957098ab0ebf733984c7a103bb64e3491ad2446369bf018488a51c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}