{
  "manageEntity": {
    "action": "Save",
    "entityId": "277849812",
    "entityType": "Track",
    "nonce": "0x5ba2e33aacf8e85dc4af417875d192460ae377e78f19fbbf92f4e96068936a51",
    "signature": "0xfed98611e46fc66b5c660a22f76f5e1c1ffc8eb8e0a09849d0d55324a50aab3d1e508a0b3fb4b5bfdd028f53adb79ad2a888befb61e5c3860b9372d38d7eba141c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}