{
  "manageEntity": {
    "action": "Save",
    "entityId": "2084692046",
    "entityType": "Track",
    "nonce": "0x12c5ca364fc0de0cfc46cb0329815d5f960aa3f8a48198d0ab4f6eea8d6ac99e",
    "signature": "0x248cf0dfd68ff98a82f9c21d83e42d44a49f1fa9497194362e53da5be1938efa4d722e8738c0afce8fde0c897aa462c045a22c5f4de2f484908b6664b5051b5a1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}