{
  "manageEntity": {
    "action": "Save",
    "entityId": "1816163231",
    "entityType": "Track",
    "nonce": "0x2449bb41137cc73fe97459bd246ea0dc5f2568d19753d47c15ff6b8c4444f484",
    "signature": "0xad59d856965af4a68ef58e7ffd878355b9dded588a6e57eb3a64a76e0dec90c21cc60225337f423cbcf60a90177db61a1efcca483ee6cddba8e50cd697ee32d11c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}