{
  "manageEntity": {
    "action": "Save",
    "entityId": "1288887269",
    "entityType": "Track",
    "nonce": "0xf18342362f4ee1859dc132303932af9a2332160d91a52d5f69bcb2c412ea80c5",
    "signature": "0x6ef2fe5a7b6c2a27ebf1510c6fc177aa33e520fda14e4c5f23ea987251aa5e3b7ac1833b3d6b05995e4bba825dc361a0b592646e3e2c542b5c0620bf7af406f61b",
    "signer": "0x05aba01c97C4F182D989670622abE9c797782dD2",
    "userId": "508263176"
  }
}