{
  "manageEntity": {
    "action": "Save",
    "entityId": "1919918335",
    "entityType": "Track",
    "nonce": "0xc11c3be14bf5c51e1c0fbbcaf3a84ce007c1249cd79724a37307dccdd7ed0dfa",
    "signature": "0x4f870ada0fcc067fc8973ceab092781fd075cf91fe71fa2186e2fe6e7ac19ca368728cf3fa83f010cf17531b19c5841751fffadfbe87743161c49acc95f5dffc1c",
    "signer": "0x0C9AEa01FA89c6397d469Cc761335021a2a5B07C",
    "userId": "364579809"
  }
}