{
  "manageEntity": {
    "action": "Save",
    "entityId": "16415",
    "entityType": "Track",
    "nonce": "0xdd2c4aef2d1bbdf7d29986935d090bddf11b9b3ff6c5a004dec860c322ab9512",
    "signature": "0xca01db34e7758cfee5e26b013f559bf099db2be4dd87a63bbdd4cc825c063a7a7b5a4be38014405e64fec4644997b5f3ee63f355b622f8c840aff9ad654f18e01b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}