{
  "manageEntity": {
    "action": "Save",
    "entityId": "134328832",
    "entityType": "Track",
    "nonce": "0x37c1c9192f7ffe44aac0bf18a4b9551ffd58917f7b715be898695331de32e233",
    "signature": "0x5e363a7aa5fbd87b6443fe00b8057d6a7a76c5ec9e99610d55d6978593b495de31f10eb368487f02e830471bbba5b8343c9c8f5a86211dc2b12cdbf5bb187f5c1b",
    "signer": "0xaFdEC27229de1023f5322f4Dbf0e874dC548011F",
    "userId": "817564020"
  }
}