{
  "manageEntity": {
    "action": "Save",
    "entityId": "510464193",
    "entityType": "Track",
    "nonce": "0xb8088ef54bb6bbf384e421bc0ba0cf393a574f183aa93e192cb737269d21af38",
    "signature": "0xd155902db3642590dec736f1b13644f64d8b8fe64a028e1010477d077b7278d60d276626b47b79fca7c4b232ee7d3fa962a04ca69883f24d570b12d5a5700e6f1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}