{
  "manageEntity": {
    "action": "Save",
    "entityId": "287928658",
    "entityType": "Track",
    "nonce": "0xc82a85c69dad951267200c34e740c86fd2cc3df275cd927e00c8a7c432d770d9",
    "signature": "0x69213c516cae15b99336139861ca68b0aecdbe7fc44ba0ea7ab3fee807cf583f152beed9bef85e3577ba88ca35ab794b20c7f1f4e5496eac42d5ce53c0b0d84f1b",
    "signer": "0x0246262E4959323EAC2FBf603C6D24352d57Fc51",
    "userId": "700531000"
  }
}