{
  "manageEntity": {
    "action": "Save",
    "entityId": "206911",
    "entityType": "Track",
    "nonce": "0x089bbefdfa9b97acf2a512bc28eb46e17203e98c45f25d92e38bdddddbf11a07",
    "signature": "0x4575dfd6382f32e1c65a1837d2c892dfc823adcd388a0eeb1a3aebdaa11da078084ae0464a3b4d8816ff97f023fe0ef4d0cd693a604f1089173bc6e97c319ff61b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}