{
  "manageEntity": {
    "action": "Save",
    "entityId": "1421012695",
    "entityType": "Track",
    "nonce": "0xeb855fa46460ce8137ae233a10a9bc8e7ce1d225363bb580275bf72e2b019449",
    "signature": "0xdaeff34adea00316699df349ddbb09d47d905a75212e23ddcf160d63dfeaf4a615d59dd8541b8ad471557812a6a7555a28ba95411432e7b6ffebcab0088184c81b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}