{
  "manageEntity": {
    "action": "Save",
    "entityId": "606683852",
    "entityType": "Track",
    "nonce": "0xf99206689b76f32cebac4bcd1325c98798c40ac7c8967cde745c9e97a8c2ee82",
    "signature": "0x71f2883a18e74eafeaecffdd6d0e6ea404aeb508356e83038c275294abb060874e400ee4c47267a3780e5285c72e0c8a0318e388636b94755fca15886bb1f6ca1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}