{
  "manageEntity": {
    "action": "Save",
    "entityId": "495811469",
    "entityType": "Track",
    "nonce": "0x7c0a30f8cee2d06ea3340f75417aad010133c3192c14ff200a6d77415ba3bfc3",
    "signature": "0x6ff4536d7b2e55854b6321738fc4e292c09f1b24bdad18449ea48149b149a0732eed57c51b6246f86684421ba79d90332c6498002bde81f7a093cd6b707153681c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}