{
  "manageEntity": {
    "action": "Save",
    "entityId": "169079",
    "entityType": "Track",
    "nonce": "0x5a4f925ef3a4e147cd89f50a25339597f6acc7fd11ef227354381dd8ec6448f1",
    "signature": "0x36dc1b05cbc3ae4a2af8345cec6c27c1f83743febf17c04f80a18eb5e1b576e10421ec1744b5ae0d85a7a63610d2774e66fe0475b49fb4430fc4aba2b046d56e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}