{
  "manageEntity": {
    "action": "Save",
    "entityId": "161352493",
    "entityType": "Track",
    "nonce": "0xe97ee57aa9b363207eab90924746ba61feb26f37289797cfb9892b0d891edef5",
    "signature": "0xe5435629751704b10d2921f8645da590f9e58c6df698c90e218cccb74fa319ec03241aee2556ececfe3c058d05234dc3c1d120e2e7b46db32c025e75ade6c4001c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}