{
  "manageEntity": {
    "action": "Save",
    "entityId": "159272443",
    "entityType": "Track",
    "nonce": "0xccb7c64638ab7ad5233cbf06877c943d97fbc59da4f3f3d2c1ed6ee147b570d6",
    "signature": "0x814e713bde8da5780d6f69dde7cade23a4adc389b79c59a869a7fe8892b49b5722e554fbdacf8a3141c7cc890963bde7cc52135e44a137c26ade458beb33ca381c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}