{
  "manageEntity": {
    "action": "Save",
    "entityId": "897209743",
    "entityType": "Track",
    "nonce": "0xc0cd6b1d414bccd7242faf48b94094fd578f13291d3ae06f6172944025aaa933",
    "signature": "0xc5cb298972607f0de5de75909369a09f69052e7f8ae1b2070e3fdcfd15f476b044b881c5b5a6e77a1efce7135401fbbe6f6eac5e99638bd0d09a8625a66d57d51b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}