{
  "manageEntity": {
    "action": "Save",
    "entityId": "1426465629",
    "entityType": "Track",
    "nonce": "0x75b18c1e74acb148e52f389718e6bd218735e3afa15e87e91194d73da353bf2e",
    "signature": "0x26f8d75d2e8882d7aad5f0f9a34cd4c68d7b90a000fba8cd9e64c70c560865ce0fb0a524b2c473332aa78079c07ee9ec985a1d5cb8129f15f1d3b3138c5b61691b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}