{
  "manageEntity": {
    "action": "Save",
    "entityId": "1445475383",
    "entityType": "Track",
    "nonce": "0x96654265377c51b2aced275e6fefe01cd8efa82d6b39f1b39e16ebdb5738d567",
    "signature": "0x4345d05499d4d5aec6101e9df4f5faffb145e55f79467cfc44306e7eff98227f37152d6fde592994c4540d1b131feef61f7eefba1056ab19641e366840fde1521b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}