{
  "manageEntity": {
    "action": "Save",
    "entityId": "698863101",
    "entityType": "Track",
    "nonce": "0x5bfef69406cb2feefcfabbd481dbbe04feb7181bbf0968911a0088b793605c19",
    "signature": "0xb9758c4d7c8027aa0ac70d79624ba372eaf6040f8a6b330998df830f56ac1fa066762abf86f924da88b20ee55581bfb4400284ca744b0f14f4a056f1024e00e81c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}