{
  "manageEntity": {
    "action": "Save",
    "entityId": "1508796909",
    "entityType": "Track",
    "nonce": "0xb95284f8d5964c1c2383ae21fcb83a1e42b9b7ea21b63e9f063a998aba0c2fb2",
    "signature": "0xd7962e5ac1c1a4a4ad6a3a28bb785ed9a9ef9dee4bddae4ce7773f85616519040b58d3e6f0cccd511653e55ae198a1c8025256fdfb8fcc4a919f02502777d2ba1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}