{
  "manageEntity": {
    "action": "Save",
    "entityId": "1466385045",
    "entityType": "Track",
    "nonce": "0x9aca974fd8a49585f2ed5010e5262ca840e13b84074dec6ac3e3b2518d3220ce",
    "signature": "0x524c53f69ef7805a8b3a9b2b1e6ce6bcfe87c7b0fb1dbac00862fd7d67c3cd41335be58cdf1a4ce8555c5cf9a6a6ce90a0fa144c95ebdc8f5c4502f5b40cf8111b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}