{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359650504",
    "entityType": "Track",
    "nonce": "0xd57e3beee93559c701c4290aae7d8d9245ab3886c4cfcd403aaf3527e7b263db",
    "signature": "0xb61d6937247749793fbdc6c066b313d9740da6bd70405b0ff6bea098c4bad1a9603ef531e40429fc091f955951fa591fb6ac4a32ae05d930adf5721f59268b901c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}