{
  "manageEntity": {
    "action": "Save",
    "entityId": "170686",
    "entityType": "Track",
    "nonce": "0xa47357b2d057feabc5d3192c19661d26af9ebd519dd72027f0819fc0eafc2475",
    "signature": "0xf63e6e7f25c03cef2f4beff92b346b5ccd309def4ec2ad0f461134468fd60277395cd78ce8ebdfd24c06e3e1a748fa3e343fdd16ffdd4b5d786c933df0b2d5fc1c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}