{
  "manageEntity": {
    "action": "Save",
    "entityId": "1439332163",
    "entityType": "Track",
    "nonce": "0xa61e714b2f31108dd92a86d02aac8a9ca0ba79a42e9ff351ae4caa6bc7a4bf4b",
    "signature": "0x4fd25e5bfd693d33b881d26e61d9e4e1e746eb66489e7ac072bbfa41e307ce996f5153917b3c16d578fc02d71f8f57c8e91c351e4d0386d35cddd9686d6f71e11c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}