{
  "manageEntity": {
    "action": "Save",
    "entityId": "1490298073",
    "entityType": "Track",
    "nonce": "0x2606ec88312135451811b6630abb3620eae9452be4692227994b31c8898b76c5",
    "signature": "0xa44217dd716ffffad53a67e909787b3e784d0fdab9d76dc6d816cd27a0c7511243b6ee9e987fbac0e3763e99a08e4321e0820f7575aeb06e5a9236e1b27d10621b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}