{
  "manageEntity": {
    "action": "Save",
    "entityId": "618961832",
    "entityType": "Track",
    "nonce": "0x026ea925ddbae6752088e6bf9346636543bad391fb9f2a7272cffc84d6d6a473",
    "signature": "0x770382b1b03fbb2c50bc32f9d440e0d9273956a0e1bee8ca2270df30f8cb3ef845dec2985bd984a4c559cee27737331c1db3d54449f82ce65ded7f591cc5eed41b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}