{
  "manageEntity": {
    "action": "Save",
    "entityId": "29751380",
    "entityType": "Track",
    "nonce": "0x016ead043108b29592a88a55cfd7f7c6ca67aea1fe7b4c0198d8263d2c5b401f",
    "signature": "0x0185fc84fea5f42ff47eae1473fc63cdd080d9de767b76556c860091193f41e44e7c0bf8bd0041af9cd1718003cab30a3fe0b3e37c69a2d221c6dd020b66085e1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}