{
  "manageEntity": {
    "action": "Save",
    "entityId": "2014397970",
    "entityType": "Track",
    "nonce": "0xfba9cac1d1777a457c494fb3fcdb4a8a976c67b3134351bac38b4ba952a06923",
    "signature": "0x897de077ab5caca30f0984c8fe163ca5860e8e68cf5e1232606241fa341535692e1017c539987e1c2eec349e3d966c391f102d8cd9e02ce7d14ba4acea5e7fdb1b",
    "signer": "0xC9e4fe89311517E71e968f6DE26A6c075A639F41",
    "userId": "964899801"
  }
}