{
  "manageEntity": {
    "action": "Save",
    "entityId": "672433453",
    "entityType": "Track",
    "nonce": "0x8c032b42f19210d51fb4533a84dc5dc200f9bb0114ec1475b9e67b73a3aa62fa",
    "signature": "0x5c7ebefe86445c173206b57afb32be08788e004ae151a9d10ea34b6584b32c1a1dc66f82e8b568b88566705adc6ff657a84d0ac5dc58f2847733fb5a803621a01c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}