{
  "manageEntity": {
    "action": "Save",
    "entityId": "2031682684",
    "entityType": "Track",
    "nonce": "0xdafd5716570a1116f618e176a42085268255f574b08de09cd13222ff38b2fedd",
    "signature": "0xade004b93faaf8d1d997dd73c367fbaaeed17d81fbe3e61ea6a436b9ccc73a9e55fc4555d32d0d52178caefb23e9a8d3d8c2b9d014aacfd2e8320719e3997d451b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}