{
  "manageEntity": {
    "action": "Save",
    "entityId": "679276590",
    "entityType": "Track",
    "nonce": "0xee673d8244c309c5ae513449ddb259749d33f1f27002c7d5fd61bbfd0768ccba",
    "signature": "0xef3dbd1fbf1ae611da6697b28f293425392127ad101e41f8ff5627534edbff4631f60f6872f4248d916d4d78215f92020b45d156ab736a2d9ac566199ba518791b",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}