{
  "manageEntity": {
    "action": "Save",
    "entityId": "440025",
    "entityType": "Track",
    "nonce": "0xd269a4737097752470c13dc5bacfa5bede75527d1a976a1da8e396d132dc04c1",
    "signature": "0x379a7c9b5985748a3322a0e50d56bdf78dd04ea49c61edcc3e14e9764ffa40961cbf3cea28f4b867519158f4063e9e0c80cdcd15f679f2847bdb79c291366ca31c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}