{
  "manageEntity": {
    "action": "Save",
    "entityId": "126690",
    "entityType": "Track",
    "nonce": "0x4d0bfd009a875cb13b85911fb94bf37a872e864bfc3ba847a1c350a9f075ccbb",
    "signature": "0x251dfc2a22a0459879fa7b7ea99bac79beeec0761000bab7cfe7762c62d361121cdadbf30a1360832cc7130b2c319b9c3f3c2d8062a33eca84e9a716f5c2f3b91b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}