{
  "manageEntity": {
    "action": "Save",
    "entityId": "91703082",
    "entityType": "Track",
    "nonce": "0x79ef77bcc349851d3bc18578c9698adc142e143279dd8779a471073950ff4777",
    "signature": "0xe00559a92d1bb1c3d735bb749d38f9e2fdb16d6eb6cb592b7e216c580c60b7af7745cc93f14cc8f5e48cc462775f5ecd1795104fc2b3f8fb7856df7f37370ad71c",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}