{
  "manageEntity": {
    "action": "Save",
    "entityId": "395801782",
    "entityType": "Track",
    "nonce": "0xc106a864b0f47fd0d23179db8ac5bd7d18f8fbbe8f6e2e7dbd028da1bd5bea03",
    "signature": "0x19ca4aeff74ce95f50ca48ea3c4132cb177c38a9b74228276c5eac61e3c64dfa05e4541b9eb36979dfd1adeda3cbb34ce122a5862ba686dfcabf67bbaa10de291c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}