{
  "manageEntity": {
    "action": "Save",
    "entityId": "205933",
    "entityType": "Track",
    "nonce": "0xe56e9f5c3ef7516db5bb7571cc84b2da399feecdd65c391e288c8e1b13d2f105",
    "signature": "0x3d77d5af5308f9ae647552b0aae265e1510accdbcd831044396dacdefc83200a2b5e4d32e58ed4e52d445205c77d1dbf53fcf3ad2fa1cda69ad943d5d7e16a901c",
    "signer": "0xA3B40AD9bEaDeb7a11B85d9088BaC12a3F2Eca1f",
    "userId": "199809170"
  }
}