{
  "manageEntity": {
    "action": "Save",
    "entityId": "633729558",
    "entityType": "Track",
    "nonce": "0x4f13e22beb7554239585437439fea3106ba41faee0a150bd1a2e6e625ded55b0",
    "signature": "0xfb80e165119180403630686f8b0cb69ac6c51c4b789a17b24301731b0912f46c2d3c5b83b5e2b5d68820f33986105f5297bdba4f392f9e02127af37ec663e18f1c",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}